Furnace grate



Patented Nov. 22, 1.932

JOHN J. FLEMING, oF vrimnnlngnnwaanslag?. f

FURNACET Application filedv February 1st-1332; Yfseyria1-ivd. 5aay3f iA The subject of my invention is an improved furnace grate especially adapted to burn buckwheat coal under natural or chimney draft. My improved grate permits of sub- 5 stantially complete combustion ofthe fuel,

because it insures an adequate supply and distribution of air both from beneath to the fuel on the grate and to the space directly above the fuel on the grate. By supplying 10 air to the space above the fuel on the grate ,a satisfactory combustion ofV thegases distilled from the coal is obtained. VMy improved grate also permits thorough removal.

W of ash and avoidance of clinker by providing 3 teeth at the edge of the grate which grind the clinker and which provide a space through which the ash may escape.

In general my grate consists of a. support, a bottom member carried by said support- C'O and having an outer annular portion,ape r forated conical grate carried on said bottom member, and a flue extending through and above said conical grate for conducting air to the space above the fuel onthe grate.

For a further exposition of my invention reference may be had to the annexed drawing and specification at the end whereof my invention will be specically pointed out and claimed. OO In-the drawing, v

Figure 1 is a central vertical cross sectionl through my device.

Figure 2 is a plan view with parts broken away on the line Q-Qof Figure 1. 1 y

In that embodiment'of my invention chosen vfor illustration in the drawing, my device is shown as consisting of a support 1 which may be a flange or shoulder on the wall of the furnace or other surrounding casing 2.

Mounted on supportJ 1 I provide a bottom member which includes an outer annular Y member 4 which has a plurality of openings 5 therein. Openings 5 are of decreasing cross section from the top to the bottom'to retain coals which lodge thereinuntil they are completely burned. On its outer upper edge, outer membere is provided with upstanding teeth 6 which provide notches or o, openings 7 between them. Across one di- 5 ameter of the bottom `member extends a bracketiS-ha'ving an enlarged-central portion l i:

9i` whichcar-ries fag groove '10 f therein jwhich serves Vas' the lower!V racef forL a` plural-ityof ball bea-rings 11. Bracket 8 also-has acef tral l'op ening therein. Depending from'afpb tionof bracket-Bisi aiperforatedllug' lwhlc is oppositeto ja similar perforated'dependililgl throughout the iewerA paraba-@feastettoia fe face l and at its V'bottoirrz"outer f edget 'fcarriesa plurality of teeth 2,1 adapted to meshxfwith gear?16':v4 On its outerflate'ral'edge `Vgrate-*18` y Olfrries a-'plurality iof 1 extending fneis 22 which,` extend: opposite to; '-teetlil Iido? f outer 89 portion 4L Fingers l22andteethl f6 supporti'-` fuel thereonso that "itiis'exposed'toth'e 'draft through'openings Fingers 22aiid/teet'hf also providei a cuttingfor grindingl'actionjfor portions offash or' chfA lodge *tlIereV 857i 1 In itscent'ralfportifofn4 grate 3184has "af" tube 23'A having a plurality? of fopeningsf 2f4in "its" side walls andan opening-i215 .at-fits top."v Sur! Vrounding*opening-25 on the `topfof1 grate-1 8 90 I Aprovide afiiue- -26` which confsilst's `offan up! standin gwall` {having a closed-"top '27.51 Ad! jacent the tepof carbureter '-26th`er`eare1p'1-iz videda plurality of`v openings QS'fWhic'hae" preferably@ v-fshaped so thaeithefgeaef 951 proportion of Iair is expelled" from the ofthe kholes and so that lo.dgementI of nfuel ,it is'beiieved'uaf theopemaon @my vicefwouid 'be fairly. obviu's fromfthe 'ro'rev 100 f going-description. Fuel such as buckvvheat coal is placed Within the furnace 2 upon the grate 18 and the bottom Imember. kThe level of the height ofthe fuel is preferably slightly belovvY the openings 28 in carburetor 26. Air under natural, chimney or forced draft enters through openings orvthrough the bottom of grate 18 andopenings 20 to the under side of the fuel'bed whence` itA rises through the fuel bed and promotes an even and active combustion therein. Additional portion, a tube extendingvertically centrally of said grate and having perfor-ations in its lateral Walls, a Wall upstanding from said grate and surrounding the upper endv of said tube, a solid top on said Wall, and perforations in the upper portion offfsaid Wall adja-k cent said top. f Y t Y 1 rJOHN J FLEMING.

air passes through the bottom of grate 18, s, y.

throuoh the openings 24 and the openings 28 Vin ue 26. This air is delivered preferably onanylfuel'or. clinker'which'is lodged therebetween/Any fuel in this portion ,ofthe `gllltit is readily burned due to the .airsup-f plied through openings andbetween the edge of grate 18 and- 'bottommember,

Clinkeror ash readily falls through the space betWeengthe lower part of grate18 and the bottom memberinto an.l ash pit b the grate. h s v vkAlthough grate 18 and bottomr member eneath 'are shofvvn asfcircularrin plan ,they may, if

desired, be made rectangular in outline in plan. 1 mayalso provideother types of bearlngs than the ball bearings 11 if l so desire; Ido not intend to belimited in the practice of my invention save as thescope of the prior artand ofthe attached claim `may require.

Iclaim:v 1 y to the space above the Vfuelbed and thereby lf'fAk furnacelgrate Aintendedlfor the completek combustion of coal includingv in combination o asupport, a bottom member mounted on said support and having a perforated outer,l pore `t1on',' upstanding teeth on saidouter portion,

said perforations in said outer portion being of decreaslng lcross section 4.from top to bottom, a breek?? across.1`1Said1bott0m-member and having a central opening and abearing race therein,;a perforated depending lug on i i' said bracket, aperforated depending lug on said outer portion, a shaft mounted' in the perforations insaid lugs, aV gear mounted on Said shaft, means for attaching an actuating f member to said shaft, asconicaly perforated grate mounted onsaidbracket, ya stub shaft on saidgrate extending throughsaid central opening, rotatablek bearings interposed Vbetweensaidbracket and said grate, teeth on the lower outeredge of said 'grate cooperate ing' with said gear, j'outstanding fingers on thelower lateral edge of said grate spaced opposite 'said upstandingfeth on said outer 

